Feature:1. Magnetic Screwdriver Bit: The screw head incorporates a high strength magnetic ring to effectively prevent the screw from falling off.2. Large Torsion: This screwdriver bit has a concave design in the middle of the bit for more torsion, better toughness, high bite when working, and less damage to the screw.3. Alloy Steel: This screwdriver bit is made of alloy steel, with an overall high temperature quenching and hardness of HRC65 for a longer service life.4. Standard Size: This screwdriver bit is a standard 1 or 4in double ended cross hex shank connector with ten pieces for durability.5. Wide Application: Can be used for manual screwdrivers, hand drills, lithium ion drills, electric screwdrivers, pneumatic screwdrivers.Specification:Item Type: Magnetic Screwdriver BitMaterial: Alloy steelScrewdriver Bit Size: PH2Screwdriver Bit Diameter: 1 or 4in Hex Shank.Package List:10 x Magnetic Screwdriver Bit1 x Storage Box